> [!AppendReady] > <table><tr><td rowspan="4" width="25%"><img src="assets/wl_ipc_appendready.png"></td><td><b>Wait Category</b></td><td>IPC</td></tr><tr><td><b>Mechanism</b></td><td><code>ExecParallelAppend</code></td></tr><tr><td><b>Operations</b></td><td><a href="Operations/Table/SeqScan">SeqScan</a>, <a href="Operations/ResultSet/Materialize">Materialize</a></td></tr><tr><td><b>Resources</b></td><td><a href="Resources/CPU">CPU</a>, <a href="Resources/RAM">Memory</a></td></tr><tr><td colspan="3">This wait event represents the <b>Parallel Dispatch Overhead</b> for complex query plans. In a <code>Parallel Append</code> node, the work is divided into multiple subplans (one for each partition or UNION member).</td></tr></table>